The Oxidation number of A, B and C are +6, -1 and -2 respectively. If a compound contains elements A, B and C then predict the molecular formula of compound ?

{A B C}_{2}

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A_{2} {B C}_{2}

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{A B}_{2} C_{2}

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{A B}_{4} C

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Solution

The correct option is C ${A B}_{2} C_{2}$
Molecular formula is a chemical formula that gives the total number of atoms of each element in each molecule of a substance.
We have to note that the total charge on a neutral compound is zero.
By using the above fact,
Given,
Oxidation number of A=+6, Oxidation number of B=-1,Oxidation number of C=-2
Hence, for the compound $A B_{2} C_{2}$ we get $1 \times 6 + 2 \times - 1 + 2 \times - 1 = 6 - 2 - 4 = 0$
Hence, option C is correct answer.

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